KR20090122804A - Washing machine and method for controlling washing machine - Google Patents

Abstract

PURPOSE: A laundry processor and a controlling method of the laundry processor are provided to exactly and independently sense the quantity of laundry, based on a current value of a motor. CONSTITUTION: While a drum is in interrupted state, the drum is rotated up to at less than 180 degrees of a predetermined angle(S710). The drum is suspended(S715). During rotation, a laundry amount is detected based on a current value of a motor which rotates the drum(S720). While the rotating step and the suspending step are repeated, the sensing step for the laundry amount is carried out. If the predetermined angle is set at more than 90 degrees, the sensing step is performed only based on a current component corresponding to 90 degrees of a motor rotational angle.

Description

Washing machine and method for controlling washing machine {Washing machine and method for controlling washing machine}

The present invention relates to a laundry treatment device and a method for controlling a laundry treatment device. More particularly, the present invention relates to a laundry treatment device and a laundry treatment device control method capable of simply and accurately detecting a quantity of laundry.

In general, the drum laundry treatment machine of the laundry treatment machine washes by using the friction force of the rotating drum and the laundry by receiving the driving force of the motor in the state in which detergent, washing water and laundry are put in the drum, the damage of the laundry is almost The laundry is not entangled with each other, and knocking and rubbing can have a washing effect.

After the washing and rinsing stroke is completed, the dehydration stroke is carried out. In order for the dehydration stroke to proceed, it is necessary to accurately detect the amount of water. To this end, various coefficients such as characteristic speed values, rotation angles at specific speeds, time to specific speeds, and duty (PWM) values of specific speeds are used. However, this method has a problem in that there are too many related coefficients, and have to go through a fairly complicated process such as setting or adjusting the related coefficients differently as other conditions such as a motor and a dehydration pattern vary.

An object of the present invention is to provide a laundry treatment apparatus and a method of controlling a laundry treatment apparatus capable of simply and accurately detecting a quantity of laundry.

The control method of the laundry treatment machine according to the present invention for achieving the above object is a control method of a laundry treatment machine including a drum in which a cloth is inserted and rotated, rotating the drum to a predetermined angle of less than 180 degrees from a stationary state. And during the rotation, detecting the amount of dose based on the current value of the motor rotating the drum.

Laundry processing apparatus according to the present invention for achieving the above object, the drum is rotated by the motor, the drum is inserted and rotated, the current sensing unit for sensing the current flowing in the motor, the drum is less than 180 degrees in the stopped state The controller may be configured to rotate up to a predetermined angle of the controller, and the controller may detect a dose based on the sensed current during the rotation.

According to the present invention, based on the current value of the motor, it is possible to detect the quantity simply, accurately and independently.

Therefore, based on this, it is possible to improve the stability of the laundry treatment device and balancing of the cloth during the dehydration stroke.

Hereinafter, with reference to the drawings will be described the present invention in more detail.

1 is a perspective view showing a laundry treatment apparatus according to an embodiment of the present invention.

Referring to the drawings, the laundry treatment machine 100 includes a cabinet 110 forming the exterior of the laundry treatment machine 100, and a tub disposed inside the cabinet 110 and supported by the cabinet 110. 120, a drum 122 disposed inside the tub 120 and washing the cloth, a motor 130 driving the drum 122, and disposed outside the cabinet body 111 to be washed inside the cabinet 110. It includes a washing water supply device (not shown) for supplying water, and a drainage device (not shown) formed under the tub 120 to discharge the washing water to the outside.

A plurality of through holes 122A are formed in the drum 122 to allow the washing water to pass therethrough, and when the drum 122 is rotated, the laundry is lifted to a predetermined height and then lifted on the inner side of the drum 112 to fall by gravity. 124 may be deployed.

The cabinet 110 includes a cabinet main body 111, a cabinet cover 112 disposed at the front of the cabinet main body 111 and coupled thereto, and a control disposed at the upper side of the cabinet cover 112 and coupled with the cabinet main body 111. The panel 115 and a top plate 116 disposed above the control panel 115 and coupled to the cabinet body 111 are included.

The cabinet cover 112 includes a fabric access hole 114 formed to allow the fabric to enter and exit, and a door 113 disposed to be rotatable from side to side to allow the fabric access hole 114 to be opened and closed.

The control panel 115 is provided with operation keys 117 for operating the operation state of the laundry processing apparatus 100 and a display device disposed on one side of the operation keys 117 and displaying an operation state of the laundry processing apparatus 100 ( 118).

The operation keys 117 and the display device 118 in the control panel 115 are electrically connected to a control unit (not shown), and the control unit (not shown) electrically controls each component of the laundry processing apparatus 100 and the like. do. The operation of the controller (not shown) will be described later.

2 is an internal block diagram of the laundry machine of FIG.

Referring to the drawings, first, the control unit 210 receives an operation signal from the operation key 117 to operate. Accordingly, main washing, rinsing, and dehydration strokes can be performed. For main washing, rinsing, and dehydration strokes, the controller 210 controls the motor 130. Although not shown in the figure for motor control, it is possible to be controlled by an inverter (not shown). For example, when the control unit 210 outputs a PWM switching control signal (Sic in FIG. 3) to an inverter (not shown), the inverter (not shown) performs a high speed switching operation to supply an AC power source having a predetermined frequency to the motor 130. ) Can be supplied.

On the other hand, the control unit 210 may control to display the operation state of the laundry processing apparatus 100 through the display device 118. For example, an operation state such as main washing, rinsing, and dehydration stroke can be displayed.

The motor 130 operates the drum 122. The drum 122 is disposed inside the tub 120 as shown in FIG. 1, and a cloth for washing is inserted and operated by the rotation of the motor 130.

In addition, the controller 210 detects a dose based on the current i _o sensed by the current detector 220. Specifically, while the drum 122 rotates to a predetermined angle of less than 180 degrees in the stationary state, the amount of sensing is sensed based on the current value i _o of the motor 130. The predetermined angle may be 90 degrees. The contents of detecting the amount of dose based on the current value i _o of the motor 130 will be described later.

The current detector 220 detects a current flowing in the motor 130, that is, an output current i _o . The current sensing unit 220 may be various examples such as a hall sensor and an encoder. The current detector 220 periodically detects the current i _o flowing in the motor 130 and inputs it to the controller 210.

On the other hand, although not shown in the figure, it may further include an eccentric amount detecting unit (not shown) for detecting the amount of eccentricity of the drum 122, that is, unbalance (UB) of the drum 122. The eccentric amount detection unit (not shown) may be performed based on the rotation speed change amount of the drum 122, that is, the rotation speed change amount of the motor 130. To this end, a speed detector (not shown) for detecting the rotational speed of the motor 130 is separately provided or based on the output current value i _o of the motor 130 detected by the current detector 220 described above. The rotation speed can be calculated and based on this, the amount of eccentricity can be detected. The eccentric amount detection unit (not shown) may be provided in the control unit 210.

3 is an internal block diagram of the controller of FIG. 2.

Referring to the drawings, the controller 210 of FIG. 2 may include a speed calculator 305, a current command generator 310, a voltage command generator 320, and a switching control signal output unit 330. have.

The speed calculator 305 calculates the rotor speed v of the motor 130 based on the detected output current i _o . The speed calculator 305 may calculate the position of the rotor in addition to the speed of the rotor.

The current command generation unit 310 generates a current command value i ^* _d , i ^* _q based on the operation speed v and the speed command value v *. That is, the current command generator 310 generates a PI command current (i ^* _d , i ^* _q ) based on the estimated speed v and the speed command value v ^* , and a current command value i. ^* _d , i ^* _q ) may each include a current command limiting unit (not shown) for limiting its level so as not to exceed a predetermined value.

Voltage command generation unit 320 based on the current command value ^{_{(i * d, i * q}} ) and the detected current (i _o), generates a voltage command value ^{_{(v * d, v * q}} ). That is, the voltage command generation unit 420 generates a PI command value v ^* _d , v ^* _q based on the current command value i ^* _d , i ^* _q and the detection current i _o . ) And a voltage command limiting unit (not shown) for limiting the level so that the voltage command value v ^* _d , v ^* _q does not exceed a predetermined value, respectively.

The switching control signal output unit 330 generates an inverter switching control signal Sic, which is a PWM signal, based on the voltage command values v ^* _d and v ^* _q and outputs the inverter to the inverter (not shown).

The motor 130 operates by following the speed command value v ^* by the inverter switching control signal Sic. During rotation of the motor 130 to a predetermined angle, the speed command value v ^* may be, for example, 50 rpm in order to detect a quantity based on the current value of the motor 130.

Meanwhile, the current value of the motor 130 is preferably an output current i _o of the motor 130 detected by the current sensing unit 220, but is not limited thereto, and the current command value i ^* _d , i ^* _q ). Output current (i _o) of the motor 130 is the current command value (i ^* _d, i ^* _q), because the tracking and flow, the current command value on the basis of (i ^* _d, i ^* _q), also perform poryang detected have.

4 is a view showing an example of the operation of the drum in the laundry treatment machine of FIG.

Referring to the drawings, FIG. 4A shows that the drum 122 is at rest. That is, it shows that the predetermined fabric 410 is disposed at the lower end in the drum (122). 4B shows that the cloth 410 is attached to the left side while the drum 122 rotates clockwise at an angle, 90 degrees in the figure.

As such, the controller 210 detects the amount of dose based on the current value of the motor 130 during the rotation of the drum 122 while rotating the drum 122 to a predetermined angle in the stop state. Stopping and rotating can be repeated.

The rotational speed of the motor 130 is preferably the speed at which the cloth 410 is attached to the drum 122, which may be approximately 50 rpm.

5 is a view showing an example of the operation of the drum in the laundry treatment machine of FIG.

Referring to the drawings, FIG. 5 is similar to FIG. 4, but there is a difference in the pattern of rotating the drum 122. FIG. 5A shows the stopped state of the drum 122 as shown in FIG. 4A, and FIG. 5B shows that the drum 122 is rotated by a predetermined angle clockwise as shown in FIG. 4B and 90 degrees in the drawing. Next, FIG. 5C shows that the drum 122 is stopped again, and FIG. 5D shows that the drum 122 is rotated a predetermined angle counterclockwise, that is, 90 degrees in the drawing. As such, while the stop-> first direction rotation-> stop-> second direction rotation in the reverse direction to the first direction is repeated, the controller 210 controls the current value of the motor 130 during the rotation of the drum 122. Detects the amount of fuel on the basis of

FIG. 6 is a graph illustrating a relationship between the number of cloths and a current of the laundry treatment machine of FIG. 1.

Referring to the drawings, as the number of guns increases, the current value of the motor 130 increases. A is the case where the rotational speed of the drum 122 is the first speed, and B is the case where the rotational speed of the drum 122 is the second speed lower than the first speed.

It can be seen that as the number of guns increases, that is, the amount of guns increases, the amount of guns increases. That is, the dose and the current value have a proportional relationship. In the present invention, by using this, the amount of detection of the amount.

That is, the relationship of detecting the amount of dose based on the current value of the motor 130 described above with reference to FIGS. 2 to 5 is to detect the amount of dose in proportion to the current value of the motor 130. As described above, the amount of current can be detected based on the sum of the current values of the motors 130 corresponding to the rotations up to a predetermined angle. This rotation angle is preferably set to 90 degrees in consideration of gravity and friction in the drum 122, but is not limited thereto. For example, when the predetermined angle is set to 90 degrees or more, the amount of light may be detected based only on a current value corresponding to 90 degrees of rotation of the drum 122 among the current values of the motor 130. According to this method, the predetermined angle may be set to 180 degrees or more.

Meanwhile, as the predetermined pattern is repeated as shown in FIGS. 4 and 5, various methods may be possible, such as summing a current value of the motor 130 and sensing a quantity using the average value thereof.

7 is a flowchart illustrating a control method of a laundry treatment machine according to an embodiment of the present invention.

Referring to the drawings, first, the drum 122 is rotated to a predetermined angle from the stop state (S710). For example, in the stationary state of FIG. 5A, the drum 122 is rotated at an angle of 90 degrees clockwise as in FIG. 5B. At this time, the rotational speed of the drum 122 is preferably a speed that is attached to the inner surface of the carriage drum (122).

Next, the drum 122 is stopped (S715). For example, it stops as shown in FIG. 5C.

Next, during the rotation based on the motor current value to detect the amount (S720). During this rotation, the current detector 220 detects a current value of the motor 130, and the controller 210 receives a sensed current value and detects a dose based thereon. In other words, the amount of detected current can be summed and the average value thereof can be calculated to calculate the amount of dose.

On the other hand, while the rotation (S710) and stop (S715) is repeated, it is also possible to detect the amount of dose based on the sensed current value.

8 is a flowchart illustrating a control method of a laundry treatment machine according to an embodiment of the present invention.

Referring to the drawings, first, the drum 122 is rotated to a predetermined angle in the first direction from the stop state (S810). For example, in the stationary state of FIG. 5A, the drum 122 is rotated at an angle of 90 degrees clockwise as in FIG. 5B. At this time, the rotational speed of the drum 122 is preferably a speed that is attached to the inner surface of the carriage drum (122).

Next, the drum 122 is stopped (S815). For example, it stops as shown in FIG. 5C.

Next, the drum 122 is rotated to a predetermined angle in the second direction in the stopped state (S820). For example, in the stationary state of FIG. 5C, the drum 122 is rotated at an angle of 90 degrees counterclockwise as shown in FIG. 5D. Here, it is preferable that a 1st direction is a reverse direction in a 2nd direction. At this time, the rotational speed of the drum 122 is preferably a speed that is attached to the inner surface of the carriage drum (122).

Next, the drum 122 is stopped (S825). For example, as shown in FIG. 5A.

Next, during the rotation, the amount of quantity is sensed based on the motor current value (S830). During this rotation, the first direction rotation S810 and the second direction rotation S820 are performed. In this case, the current detection unit 220 detects a current value of the motor 130 and controls the control unit 210. ) Receives the detected current value and detects the amount of dose based on it. Since the current value is sensed while rotating in the second direction opposite to the first direction, it is possible to detect the amount of fuel more accurately.

Meanwhile, while the first direction rotation S810, the stop S815, the second direction S820, and the stop S825 are repeated, the dose may be detected based on the sensed current value.

On the other hand, as described above, based on the current value of the motor 130, a simple and accurately detected amount of water, can be usefully used for balancing the cloth during the dehydration stroke, and thus the stability and stability of the laundry treatment machine 100 Can improve gun balancing.

On the other hand, the control method of the laundry treatment machine of the present invention can be implemented as code that can be read by the processor on a processor-readable recording medium provided in the laundry treatment machine. The processor-readable recording medium includes all kinds of recording devices that store data that can be read by the processor. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like, and also include a carrier wave such as transmission through the Internet. The processor-readable recording medium can also be distributed over network coupled computer systems so that the processor-readable code is stored and executed in a distributed fashion.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1 is a perspective view showing a laundry treatment apparatus according to an embodiment of the present invention.

2 is an internal block diagram of the laundry machine of FIG.

3 is an internal block diagram of the controller of FIG. 2.

4 is a view showing an example of the operation of the drum in the laundry treatment machine of FIG.

5 is a view showing an example of the operation of the drum in the laundry treatment machine of FIG.

FIG. 6 is a graph illustrating a relationship between the number of cloths and a current of the laundry treatment machine of FIG. 1.

7 is a flowchart illustrating a control method of a laundry treatment machine according to an embodiment of the present invention.

8 is a flowchart illustrating a control method of a laundry treatment machine according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

100: laundry processing equipment 117: operation keys

118: display device 122: drum

130: motor 210: control unit

220: current sensing unit

Claims (16)

In the control method of the laundry treatment machine including a drum is inserted and rotated, Rotating the drum to a predetermined angle of less than 180 degrees in a stationary state; And During the rotation, detecting the amount of quantity based on the current value of the motor for rotating the drum. The method of claim 1, Further comprising: stopping the drum; While the rotation step and the stop step is repeated, the control method of the laundry treatment machine, characterized in that for performing the quantity detection step. The method of claim 1, Further comprising: stopping the drum; And during the repeating of the first direction rotation step, the stop step, the second direction rotation step in the reverse direction of the first direction, and the stop step, the quantity detection step is performed. The method according to any one of claims 1 to 3, The predetermined angle is a control method of a laundry treatment machine, characterized in that 90 degrees. The method according to any one of claims 1 to 3, And when the predetermined angle is set to 90 degrees or more, the quantity detection is performed based only on a current component corresponding to a motor rotation angle of 90 degrees among currents flowing in the motor. The method of claim 1, The current value of the motor, the control method of the laundry treatment machine, characterized in that the output current value flowing through the motor. The method of claim 1, The current value of the motor is a control method for a laundry treatment machine, characterized in that the current command value for driving the motor. The method of claim 1, The rotational speed of the drum, the control method of the laundry treatment machine, characterized in that the cloth is attached to the drum. A drum rotating by a motor, the drum being inserted and rotating; A current sensing unit sensing a current flowing in the motor; And And a controller for controlling the drum to rotate to a predetermined angle of less than 180 degrees in a stopped state, and detecting a quantity of quantity based on the sensed current during the rotation. The method of claim 9, The control unit further controls to stop the drum, The laundry detection unit, the laundry processing device, characterized in that for detecting the amount of the based on the detected current while the rotation and stop of the drum is repeated. The method of claim 9, The control unit further controls to stop the drum, The laundry detection unit detects the quantity of laundry based on the sensed current while the drum rotates in the first direction, stops, rotates in the second direction opposite to the first direction, and stops. Processing equipment. The method according to any one of claims 9 to 11, The laundry treatment device, characterized in that the predetermined angle is 90 degrees. The method according to any one of claims 9 to 11, If the arbitrary angle is set to 90 degrees or more, The control unit, the laundry processing apparatus, characterized in that for detecting the amount of capacity based only on the current component corresponding to the motor rotation angle of 90 degrees of the current flowing in the motor. The method of claim 9, And a current value of the motor is an output current value flowing through the motor. The method of claim 9, And a current value of the motor is a current command value for driving the motor. The method of claim 9, And the control unit controls the rotational speed of the drum to be a speed at which the cloth is attached to the drum.

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